What sad news ... Jim Carrey's ex girlfriend Cathriona White has died from an apparent suicide from a suspected drug overdose on Monday, just days after the on-again/off-again couple broke up. Police sources told TMZ that the 28-year-old Irish woman reportedly left behind a suicide note that referenced their recent split, which had occurred on Sept. 24.

ET is reporting that the L.A. County Coroner's Office confirmed that White was found dead at her home in Sherman Oaks, Calif., on Monday night.

The 53-year-old actor just released a statement:
    "I am shocked and deeply saddened by the passing of my sweet Cathriona. She was a truly kind and delicate Irish flower, too sensitive for this soil, to whom loving and being loved was all that sparkled. My heart goes out to her family and friends and to everyone who loved and cared about her. We have all been hit with a lightning bolt."

The couple originally met back in 2012 and dated briefly until ending things in early 2013. In March 2013, Carrey spoke to the Irish Independent about his breakup with the much younger makeup artist.

"I did go out with an Irish girl," he told the publication. "We're not seeing each other anymore. But she is lovely." But as of May 2015, the duo appeared to have reconciled their romance when they were spotted together holding hands in NYC.

The May/December duo appeared to be going strong. On Sept. 16, Carrey last mentioned White on social media when he snapped a photo of "Grand Central, NYC," and wrote on it, "Photo by Cathriona White."

White's final social media post was a telling tweet on Sept. 24 that said, "Signing off Twitter, I hope I have been a light to my nearest and dearest," she wrote. "[Love] to you all."

How sad ...